Product Reference

Flat Panel/CRT Video Controller

The Little Board/486e CPU provides an integrated high-performance super VGA video controller that supports both CRT and flat panel displays. Table 2–27 provides a summary of the Video Interface connectors and their specific use and features are described in the following sections.

It is possible to disable the on-board video controller by removing jumpers W11 and W12. This can help developers recover from a misprogrammed video BIOS by allowing the installation of a second display card. To re-enable the video controller, install W11 and W12 and reset the system.

Table 2–27. Video Connector Summary

Name

Connector

Pins/Type

Description

 

 

 

 

Flat

J3

50-pin Shrouded

Provides connections for a broad array of standard

Panel

 

.100 Header

flat panel displays. Intended for standard 50-wire

 

 

 

ribbon cable.

 

 

 

 

LCD

J4

12-pin Shrouded

Ampro provides a small add-on board that will supply

Bias

 

.100 Header

the Vee voltage for most common LCD flat panel

Supply

 

 

displays. It mounts to this connector. For details

Option

 

 

about the Vee Supply Option, refer to it’s section,

 

 

 

below.

 

 

 

 

CRT

J5

10-pin Shrouded

Provides connections for a CRT display. To connect

 

 

.100 Header

to a standard CRT cable, use a short transition cable

 

 

 

to a DB-15 connector.

 

 

 

 

Connecting a CRT (J5)

Analog video signals from the video controller appear on 10-pin dual row header, J5. These signals are compatible with the standard video monitors commonly used with desktop PCs. Specifications for compatible monitors are provided in Chapter 3.

Normally, signals from J5 are connected to a standard DB-15 video connector by a transition cable made from a ribbon cable connector and a short length of 10-wire ribbon cable. The transition cable can connect the video signals to a bulkhead-mounted DB-15 or DB-9 connector, allowing any standard CRT to be easily connected using a standard monitor video cable. Table 2–28 gives the signal pinout of J5 and pin connections for a DB-15 connector. Pin connections for a DB-9 connector, used for some monitors are also provided. Table 2–29 26 shows manufacturer’s part numbers for mating connectors to J5.

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Ampro Corporation 486E manual Flat Panel/CRT Video Controller, Connecting a CRT J5, Name Connector Pins/Type Description